Originally Posted by kpinnn
How about the internal dc battery charger failed so starting battery got low. It operates the lift pump. Now lift pump stops and no fuel to injector pump. Engine stops and will not restart. This happened to me due to failed diode. 8
Sorry for late reply.
It has taken me some experimenting to figure this out. And still may be a little fuzzy.
Last battery was shot. So I replaced.
Started rt up and ran fine. Tested w a multi meter all looked ok w house charger on and off.
The issue seems to be an ACR charging isolator between the power distribution panel and the pos+ pole of the battery. When the gen is running and the house mounted charger is on the ACR opens and cuts off charge to the Gen batt as the ACR is also connected to the stbd starter battery so it is protecting it for charging. I dont know why its doing this to the point of wasting the gen battery but that seems to be whats going on.
While offshore, I tested the "charge in" side of the ACR and it was reading 13.7 volts. The "charge out" side was nothing, hence the gen is draining itself out.
My immediate solution was to use a jumper cable from one of the accessory batts on the boat to feed the gen battery and it worked fine for the rest of the trip (20 Hrs)
My work around for this is going to be a separate drymount charger to supply the gen batt directly.
I am going to call Henriques Yachts and see why they do it this way. or perhaps they dont and someone messed w it.